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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
         function salary(a){
            var tmp = [l];
            var sArr = [1500, 1200, 2000, 2100, 1800];
            for(var i=0;i<sArr.length;i++){
                if(sArr[i] < 2000)
                    tmp.push(sArr[i]);
            }
            return tmp;
        }console.log(salary(a));
    </script>
</body>
</html>